Valve mechanism



June 26, 1928.

A. DEWANDRE VALVE MECHANISM INVIQVFOR Wan/06.531

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' vAnvnmncHnnrsi/n I original application filed September 14,

This invention is directedto an improvement in oppositely-acting sliding valves arranged in compact form and mounted for an- -interguiding relation-and cooperation toinsure easeand certainty of valve movement, and is adlvislon of my coope'nding appl1-= cation, Serial No. 56,320, filed September 14, 1925.' The primary object oi the invention is the provision of valves mounted for lndependent movement, with each formed with interto provide an extended guide for each; valve during the-full movement thereof; theextensions further serving as a "housing for ly or and housed within the guiding extenssions. o The-invention is illustrated in the accom- Fig. l is a longitudinal sectionalview of the valve structure, showing '7 the valves in normal closed position,

Fighis a similar view showing the suction'or inletvalve open.

: 3,. Fig 3 is a similar view showing the atmospheric or outlet vaive open. g 1

The valve structure comprises a casing l, including'a central section of interior cyllndrical formation and otherwise of any ap-.

propriate form and size. The casing has valve-controlled openings 2 and 3 at the opposite end, or at appropriate points beyond and in line with the central section. Valves .4 and 5, here shown as of an ordinary disk type, though obviously of any appropriate 'Iorni ror sealing the valve-open1ngs2 and 3.

' are arranged in the casing foriop e ning and closing movements. @nc such valve, as 4 vis provided with a hollow cylindrical extension- "6 constituting an outer" guide and havinga sliding non-leaking lit within the central sec tion of the casing, the other of such valves, 5 having a hollow cylindrical extension 7, constituting aninner guide, arranged for a sliding non-leaking tit-within the outer guide 6. guides thus provide extended bearings for the respective valves, permitting 1925, Serial no. 56,320. munda e this application med June a, 1927. Serial No. 136,349.

the independent or relative movement of the valves with ease. and certainty, holding the' valves in triieielation t0 their seats under all conditions of use,

The valves'are here shown as designed for automatic closing, for which purpose a coil spring '91'is arranged between the valves.

; The innerguide serves asa housing for, this spring, the respectively outer or opposite ends of the gui es 6. and 7 'being closed or shouldered .at 9 and 10 to form end abut ments forthe springs In the opening movement of either valve, the guide therefor moves relatively toward the other valve, and thus the spring is tensioned to compel a closing; movement of such valve when free'to act.

valvesbe selectively opened through the use of. a single actuator, and that the actuator -and related valve connections be such that one valve will be release to the influence of the closing spring before the other-valve canhe opened. Again the actuator must be capable of a neutral position in which both valves are under the free influence of the closing spring. 7 g 1 g I To provide to' i' valve operation b'y the ac; tuator, the valve 5 1s provided with a hollow extension 11, extending in opposition to its gu1ding sleeve and terminating beyond the It is furthen desired' in the particularvalve being described, that the respectivesov valve casing. The other valve 4:isprovided a with a rod 12, which extends through the inner guidesleeve 7 and through and beyond Y the tree end of the extension 11. The free terminal'ot the rodis provided with an abutment 13, here shown as a'nut threaded and therefore adjustable on the rod. l

i The actuator, preferably in the form of a lever l i has one end formed with an opening to loosely receive rod 12, between the end of valve extension Ell-and the abutment'13 on valve rod 12, the relation being such that the actuator may occupy a neutral position, that is one which is free of pressure on either the valve extension-or the abutment. a I

lln such neutral position, the valves are 7 both free of actuator influence and spring 9 functions to maintain both valves closed. (in moving'the actuator to exert pressure on t-hefabutment, valve 4 is opened, further tensioning spring 9 to insure a certain closing of valve 5. (in moving the actuator to exert pressure on the valve extension 11, valve 5 is opened and the closing tension of spring 9 on valve 4 is increased. Thus the actuator while serving to only positively open the valves, nevertheless increases the closing tension of the springon the valve not ailected, thus insuring certainty of valve action.

The guiding sleeves of both valves pro vide an enlarged. interfitting bearing guide for both valves in opening and closing, and in addition to housing and protecting the valve-closing spring, insure through this extended and comparatively l rge guiding surface, a true and proper sealing movement of the valves in action, and materially reduces the necessity for valve refitting and readjust roent, otherwise incident to valves of this type. The guiding sleeves (land 7 may if desired have packing rings, as indicated, to insure non-leaking fit. The valve structure described is admirably adapted for, though in no wise limited to, use as a distributor in servo brake mechanism Where the power means is subjected to pressure dill 'erences through control of engine suction and atmospheric admission. In this use valve {-i will control engine suction 7 through duct leading to the power cylincasing and relative to each ot der, While valve 5 will control a passage 16 open to the atmosphere and-leading to the duct 15 between the valve l and the power cylinder.

hat is claimed as new ,is:---

1. A valve structure including a casing oppositely acting valves controlling ports in said-casing, and a guiding sleeve projecting from each valve, one of said sleeves having a sliding non-lealring fit in the casing and the other of said sleeves having a sliding'nonlealring fit in the first mentioned sleeve.

' 2. A valve structure including a casing oppositely acting valves controlling ports in said casing, and concentric relativ sliding sleeves having a non-leaking l in the .sleeves being respectively carried by 5 1d valves.

3. A valve structure inclucing casing oppositely acting valves contr said casing, an outer slee uroject one valve and having a fit Within the casing, an inner sleeve car by the other valve and having a sliding nonleaking fit in the outer sleeve, and a valve closing spring housed in the inner sleeve.

4i. A. valve structure including a casing oppositely acting valves controlling ports, in said. casing, an outer sleeve projecting from one valve and having a sliding nonlealring fit within the casing, an inner sleeve carried by the other valve and having a sliding 1101b leaking fit in the outer sleeve, and a valve closing spring housed in the inner sleeve, and valve opening means car l by each valve and projected beyond one id ot the casing.

5 it valve structure hicluding a casing ,one valve and havi oppositely acting valves controlling ports 'in said casing, an outer sleeve projecting from one valve and having a sliding nonleaking fit within the casing, an inner sleeve carried by the other valve and having a sliding non-leaking fit in the outer sleeve, a, valve closing spring housedin the inner sleeve, va valve opening extension carried by one valve, and projected beyond one end of the casing, and a valve opening rod car ried by the other valve and extended through the inner sleeve and through and beyond such extension.

6.-A valve structure including a casing oppositely acting valves controlling ports in said casing, an outer sleeve projecting from one valve and having a sliding nonleakin fit within the casing, an inner sleeve carrie by the other valve and having a sliding non-leaking fit in the outer sleeve, and a valve closing spring housed in the inner sleeve, a valve opening extension carried by one valve and projected beyond one end of the casing, and a valve opening rod carried by the other valve and extended through the inner sleeve and through and beyond such extension, and an actuator to selectively exert pressure on said extension or a pull on said rod I 7. A valve structure including a casing oppositely acting valves controlling ports insaid casing, an outer sleeve projecting from one-valve and having a sliding nonleakin fit Within the casing, an inner sleeve carried by the other valve and having a sliding non-leaking fit in the outer sleeve, and a valve closing spring housed in the inner sleeve, a valve opening extension car ried by one-va lv e and projected beyond one endoi the cas1ng, and a valve opening rod carried by the other valve and extended through the inner sleeve and through and beyond such extension, and an actuator to selectively operate said extension on said rod for opening the connected valve.

A valve structure including a casing oppositely acting valves controlling ports in said casing, an outer sleeve projecting from a sliding nonlealring within the casing, an inner sleeve carried by the other valve and having a sliding.

non-leaking lit in the outer sleeve, and a and valve closing spring housed in the inner sleeve, a valve opening extension carried by one valve and projected beyond one end of the casing, and a valve opening rod carried by the other valve and extended through the inner sleeve and through and beyond such extension, an abutment on the free end of said rod, and an actuator selectively exerting pressure on said extension or semi abut-- ment to open the connected valve.

'9, In a servo-brake mechanism, a distributor comprising a casing, an engine suction control. valve therein, an atmospheric vent control valve therein, hollow guide vnon-leaking fit in the casing, the other valve having a sliding non-leak sleeves projecting from the respective valves, the sleeve of one valve having a sliding ing fit within the first mentioned sleeve,

an extension from one valve projecting be yond the cas1ng,-a. rod carried by the other valve and extending through the inner guide sleeve and through the extension, an abutment on the free terminal of said rod, an

the sleeve of actuator engaging the abutment on movement in one direction to open-the-rod connected valve and engaging the extension on movement in the opposite direction to open theremaining valve and a spring housed in the inner guide sleeve and serving to close either or both valves .When such valve or valves are free of actuator influence.

In testimony whereof I afiix my signature.

ALBERT DEWANDRE. 

